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GCN Circular 28429

Subject
Fermi trigger No 621833240: Global MASTER-Net observations report
Date
2020-09-15T23:15:09Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, 
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
D.Kuvshinov,  D. Cheryasov
(Lomonosov Moscow State University, SAI, Physics Department),

R. Podesta, C.Lopez, F. Podesta, C.Francile 
(Observatorio Astronomico Felix Aguilar OAFA),

R. Rebolo, M. Serra 
(The Instituto de Astrofisica de Canarias),

D. Buckley 
(South African Astronomical Observatory),

O.A. Gres, N.M. Budnev, O.Ershova 
(Irkutsk State University, API),

A. Tlatov, D. Dormidontov 
(Kislovodsk Solar Station of the Pulkovo Observatory),

V. Yurkov, A. Gabovich, Yu. Sergienko 
(Blagoveschensk Educational State University)




MASTER-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB200915.14 (trigger No 621833240,23h 38m 38.40s , +34d 57m 00.0s, R=16.65) errorbox  22698 sec after notice time and 68655 sec after trigger time at 2020-09-15 22:31:31 UT, with upper limit up to  19.7 mag. The observations began at zenith distance =  4 deg. The sun  altitude  is -41.8 deg. 

The galactic latitude b = -25 deg., longitude l = 107 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1441980

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   68746 | 2020-09-15 22:31:31 |      MASTER-Tavrida | (00h 42m 37.75s , +41d 16m 10.4s) |   C |   180 | 19.7 |        
   68947 | 2020-09-15 22:34:52 |      MASTER-Tavrida | (00h 42m 31.61s , +41d 15m 37.9s) |   C |   180 | 19.7 |        
   69148 | 2020-09-15 22:38:12 |      MASTER-Tavrida | (00h 42m 32.43s , +41d 16m 35.5s) |   C |   180 | 19.7 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.